FYI I think you've misinterpreted the parent. To my eyes it looks like they're agreeing that Rust makes summing a list easy using combinations. For example, this is how I would do it in Rust:
x.iter().sum() x.iter().sum()This sounds like someone complaining that the concepts they learned when they were first starting out are the only concepts that programming languages should introduce which is silly - technology evolves as we find better and new ways of accomplishing old tasks.